Craig McQueen added the comment:
One ongoing weakness I see with this situation is that it's difficult to code a
suitable work-around if a user wants to zip files that have a date < 1980 (e.g.
to zip it with a datestamp of 1-Jan-1980).
https://stackoverflow.com/q/45703747/60075
I am trying to create a zip file with Python 3.5.2 zipfile, on Linux. Some of
the files I'm trying to add have timestamps of 1-Jan-1970 (embedded system
without a real-time clock module). So zipfile gives an exception:
ValueError: ZIP does not support timestamps before 1980
My goal then is to implement a work-around to add these files to the zip file
with a timestamp of 1-Jan-1980. However, I am finding it difficult to find a
suitable work-around.
At first I thought I can do this:
def zinfo_from_file(fullname, arcname):
st = os.stat(fullname)
mtime = time.localtime(st.st_mtime)
date_time = mtime[0:6]
if date_time[0] < 1980:
date_time = (1980, 1, 1, 0, 0, 0)
zinfo = zipfile.ZipInfo(arcname, date_time)
return zinfo
...
zinfo = zinfo_from_file(fullname, arcname)
chunksize=512
with open(fullname, 'rb') as src, myzipfile.open(zinfo, 'w') as dest:
while True:
data = src.read(chunksize)
if not data:
break
dest.write(data)
...
However, it turns out that myzipfile.open(zinfo, 'w') is not supported until
Python 3.6. (I'm using Yocto to build embedded Linux, which currently only
supports Python 3.5.x.)
I guess I could try doing myzipfile.writestr(...), although then it appears
that I have to load the entire file data into memory.
----------
nosy: +cmcqueen1975
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